Question

A cross-country skier can complete a 7.5 km race in 45 min. What is the skier’s average speed? km/h

Answer 1

10 km/h is the correct answer

Answer 2

Answer: The average speed of the skier is 10 km/hr.

Step-by-step explanation:

Average speed is defined as the ratio of total distance traveled to the total time taken.

Mathematically,

`\text{Average speed}=\frac{\text{Total distance}}{\text{Total time taken}}`

We are given:

Total distance traveled = 7.5 km

Total time taken = 45 min =
`45min* (1hr)/(60min)=0.75hr` (Conversion factor: 1 hr = 60 min)

Putting values in above equation, we get:

`\text{Average speed of skier}=(7.5km)/(0.75hr)=10km/hr`

Hence, the average speed of the skier is 10 km/hr.